Last



w ing and unlocking positions, provision being Patented Apr. 115, 192 i.

cairn sr JOHN C. SGEIELTER, OF PITTSFOBD, NEW YORK.

Application filed .Tune e,

To all whom it may concern:

Be it known that 1, JOHN C. SonELTER, a citizen of the United States, and resident of Pittsford, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Lasts, of which the following is a specification.

llhe present invention relates to lasts and more particularly to the type in which the last embodies two last parts movably connected together and secured in an expanded position by a lock or detent, an object of this invention being to provide a spring which acts to hold the detent both in lookmade for causing the spring to shift the detent toward locking position when the last is collapsed. Another object of the invention is to provide a spring for a locking detent which has a locking position and a pressure position the surface with which the spring engages in looking position being shiftable on the collapsing of the last to cause the spring to move automatically to pressure position. Still another object of the invention is to provide a bonding means rigidly secured to one of the last parts and movable on the other of the last parts, the bonding means having a portion with which the de tent spring engages to lock the detent out of locking position, this portion being shifted relatively to the spring on collapsing of the last so that the detent is released to move to the detaining position. A still further object of the invention is to provide a locking detent and a bonding plate lying in the same plane, the detent being pivoted to one last part, and the bonding plate being rigidly secured to the other last part and having an abutment surface with which the detent en- ,gages to lock the last in an expanded posi tion.

To these and other ends, the invention consists of certain parts and combination of parts, all of which will be hereinafter described, the novel features being pointed out in the appended claims. 7

In the drawings:

Fig. 1 is a sectional view through a last showing the latter locked in expanded position;

Fig. 2 shows the locking detent shifted and held away from looking position before the last is collapsed;

Fig. 3 is a detail view showing the mannor in which the detent cooperates with the 1921. Serial m. 475,062.

bonding member to assist in shifting the spring to pressure position on the collapsing of the last;

Fig, 4 shows the manner in which the locking detent is released upon the collapsing of the last; and

Fig. 5 is a horizontal section on the line 5-5, Fig. 1.

Referring to the embodiment of the inven tion herein illustrated, 1 indicates the heel part of the last and 2 the toe part. These last parts are preferably pivotally connected through a pivot pin 3, which passes through the toe part 2 and also through a bonding member 4 which, in this instance, is in the form of a plate rigidly secured in a kerf 5 through pins 6 and projected into the kerf 7 of the toe part, the pivot pin 3 extending therethrough. The last parts have their opposed faces cut away to provide a space 8 above the pivot 3 so as to permit the collapsing of the last. The bonding member 4 preferably also serves as an abutment and to this end it is provided with a recess 9 forming a forwardly projecting portion 10 above said recess, the end 11 of said for- Wardly extending portion serving as the abutment.

Vith the end in view of locking the last in an expanded condition, there may be provided a lock or detent 12' which, in this instance, is pivoted in the kerf 7 of the toe part of the last on a pivot pin 13, said detent extending rearwardly from the pivot, so as to cooperate with the abutment 11. This detent is depressed downwardly out of enagement with the abutment and when the ieel part. is swung with reference to the toe part to collapse the last this detent enters the recess 9 below the projection 10 as shown in Fig. 4 of the drawings.

It is desirable in collapsible lasts with looking detents to provide some means for securing a detent out of locking relation with the abutment with which it cooperates to efi ect the locking action, and in this embodiment there is provided a spring 14: which is so mounted and constructed that, when the detent 12 is depressed or moved away from looking relation with its cooperating abutment, this spring will retain or hold the abutment out of such locking relation, rovision being made whereby when the ast is collapsed the spring will again be brought into action to exert pressure upon the detent in the direction to move the latter towards its cooperative relation with the abutment. In this embodiment of the invention the spring 14 is of a curved formation, being anchored at 15 to the detent 12 eecentrically to the axis of the latter. The free end of the spring cooperates with a part preferably carried by the heel part or part other than that on which the detent is mounted. In this instance, this part is in the form of a nose or projection 16, the end of the spring which is curved at 17 when in operative position engaging the end on one side or surface of said nose or projection as shown in Fig. 1 so that the tension of the spring tends to move the detent toward looking position. l Vhen the detent is depressed, as shown in Fig. 2, the curved end 1'? rides to cooperate with the surface or side 18 of the projection in this position binds againstsaid face or snaps behind the projection so that the detent is locked in its depressed position. This position is held until the last is collapsed when the surface 18 of the projection is forced against the spring end 17 causing the latter to ride of the face 18 and onto the opposite side of the projection 16, as shown in Fig. 4. This shifting of the spring to pressure position is assisted by the engagement of the detent'with a fixed part on the last part on which the bonding member is rigidly secured. In this instance, the surface of the bonding member a is engaged by the under side of the detent as shown in Fig. 8 until the spring passes over the point of the projection 16 when the spring shifts the detent to the position shown in Fig. 4. This prevents the breaking of the spring. In this position the spring again exerts pressure on the detent and when the last is expanded the detent will move upwardly to cooperate with the abutment 11. i

The operation of the invention will be understood from the foregoing but it may be summarized as follows: Assuming that the parts are in the positions, as shown in Fig. 1, and it is desired. to collapse the last; pressure isapplied manually to the detent 12 to depress the latter or move it downwardly out of cooperation with the abutment 11. This carries the end 17 of the spring into engagement with the shoulder or surface 18 of the projection 16 so that the spring interlocks with the bonding plate and prevents the return movement of the detent. lVith the collapsing of the last the bonding plate a is forced'against the spring end 17 in such a manner that the spring end rides oft the face 18 onto the opposite side of the projection 16 and inthis position exerts pressure in a direction to move the detent into cooperative relation with the abutment. This occurs when the last is expanded.

From the foregoing it will be seen that there is provided a last in which there is means for causing the action of the spring to cease when the lock or detent is moved to unlocking position, this means automatically causing said spring to become efiective to return the detent to locking position when the last is collapsed and then expanded. With this means there is arranged preferably a bonding member which has a surface forming an abutment engaging with the spring which is shifted into such engagement when the lock or detent is depressed. This abutment on the bonding member cooperates with the spring when the last is collapsed to force said spring off said surface to a point on the bonding member where the spring action is again effective. it follows therefore that the bonding member has a locking surface and a pressure surface, the spring being shifted to the locking surface on the depression of the detent or look and to the pressure surface on the collapsing of the last. The bonding plate which lies in a plane with the detent...

has an abutment with which the detent engages to lock the last in an expanded position.

VVha-t I claim as my invention and desire to secure by Letter Patent is:

1. In a last, a forepart and a heel part, bonding mechanism uniting the said parts and arranged for relative movement of the parts to collapse the last, and a locking member mounted in one last part and engaging the other to hold the last in extend ed position, said locking member being arranged to be thrown out of locking position by the operator, and the bondingmechanism being constructed and arranged to push the locking member back toward locking position during the change in lengthof'the last.

2. In a last, a forepart and a heel part, bonding mechanism uniting the said parts and arranged for relative movement of the parts to collapse the last, a locking member mounted in one last part and engaging the other to hold the last in extended position, said locking member being arranged tobe self looking out of locking position when thrown out of locking position by the operator, and the bonding mechanism being'constructed and arranged to push the locking member back toward locking position during the change in length of the last.

3. In a collapsible last, a heel part, a forepart, a hinge member uniting said parts, and a locking member mounted in one part and abutting the other to hold the last extended, and arranged to be thrust toward the hinge member to move it from looking position, the hinge member being arranged to move the locking member back toward lockingpo sition during the relative movement of the last parts.

4. In a collapsible last, a'heel part, a fore- Me ia?" part, a bonding member uniting said parts, and a locking member mounted in one part and abutting the other to hold the last extended, and arranged to be thrust toward the bonding member to move it from looking position, the bonding member being arranged to move the locking member back toward locking position during the relative movement of the last parts.

5. In a collapsible last, a heel part, a forepart, a hinge member uniting said parts, and a locking member mounted in one part and abutting the other to hold the last extended, and arranged to be self locking when thrust toward the hinge member to move it from locking position, the hinge member being arranged to move the locking member back toward locking position during the relative movement of the last parts.

6. In a collapsible last, a locking member arranged to be self locking in inoperative position to permit collapse, and a swinging hinge member arranged to meet the locking member during collapse to unlock the locking member from inoperative position.

A last comprising a fore part and a heel part divided by a cut providing a V shaped opening at the top, a bonding member pivotally connected with one of said parts, retaining means rigidly securing said bonding member in the other of said parts; an abutment rigid with said bonding member and separate from said retaining means, said abutment being exposed at the V shaped opening, a detent exposed for manual operation at the V shaped opening, movably mounted on the said last part to which the bonding member is pivotally connected and arranged to cooperate with said abutment, and holding means for holding said detent out of cooperation with the abutment when the detent is shifted manually from such cooperation while the last is in an expanded condition.

JOHN C. SGHELTEB 

